Paste your messy or minified JSON into the editor. Click 'Format' and it instantly adds proper indentation, line breaks, and spacing. Your JSON becomes readable with collapsible tree view and syntax highlighting.

Yes! The tool automatically validates syntax and highlights errors with line numbers. It catches missing commas, unclosed brackets, invalid escape characters, and type mismatches. Fix errors before using your JSON in production.

Absolutely. Use 'Minify' to compress JSON into a single line (great for APIs and reducing file size). Use 'Format' to expand with 2-space or 4-space indentation. Toggle between views instantly.

Files up to 5MB are supported (approximately 500,000 lines). The formatter uses efficient streaming for large files. For extremely large files, it provides partial formatting to maintain performance.

Yes! The editor allows direct editing with autocomplete for brackets and quotes. Changes are validated in real-time. You can also load JSON from a URL or upload a .json file directly.